1 /* $NetBSD: mtest2.c,v 1.3 2021/08/14 16:14:57 christos Exp $ */
2
3 /* mtest2.c - memory-mapped database tester/toy */
4 /*
5 * Copyright 2011-2021 Howard Chu, Symas Corp.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted only as authorized by the OpenLDAP
10 * Public License.
11 *
12 * A copy of this license is available in the file LICENSE in the
13 * top-level directory of the distribution or, alternatively, at
14 * <http://www.OpenLDAP.org/license.html>.
15 */
16
17 /* Just like mtest.c, but using a subDB instead of the main DB */
18
19 #include <stdio.h>
20 #include <stdlib.h>
21 #include <time.h>
22 #include "lmdb.h"
23
24 #define E(expr) CHECK((rc = (expr)) == MDB_SUCCESS, #expr)
25 #define RES(err, expr) ((rc = expr) == (err) || (CHECK(!rc, #expr), 0))
26 #define CHECK(test, msg) ((test) ? (void)0 : ((void)fprintf(stderr, \
27 "%s:%d: %s: %s\n", __FILE__, __LINE__, msg, mdb_strerror(rc)), abort()))
28
main(int argc,char * argv[])29 int main(int argc,char * argv[])
30 {
31 int i = 0, j = 0, rc;
32 MDB_env *env;
33 MDB_dbi dbi;
34 MDB_val key, data;
35 MDB_txn *txn;
36 MDB_stat mst;
37 MDB_cursor *cursor;
38 int count;
39 int *values;
40 char sval[32] = "";
41
42 srand(time(NULL));
43
44 count = (rand()%384) + 64;
45 values = (int *)malloc(count*sizeof(int));
46
47 for(i = 0;i<count;i++) {
48 values[i] = rand()%1024;
49 }
50
51 E(mdb_env_create(&env));
52 E(mdb_env_set_maxreaders(env, 1));
53 E(mdb_env_set_mapsize(env, 10485760));
54 E(mdb_env_set_maxdbs(env, 4));
55 E(mdb_env_open(env, "./testdb", MDB_FIXEDMAP|MDB_NOSYNC, 0664));
56
57 E(mdb_txn_begin(env, NULL, 0, &txn));
58 E(mdb_dbi_open(txn, "id1", MDB_CREATE, &dbi));
59
60 key.mv_size = sizeof(int);
61 key.mv_data = sval;
62
63 printf("Adding %d values\n", count);
64 for (i=0;i<count;i++) {
65 sprintf(sval, "%03x %d foo bar", values[i], values[i]);
66 data.mv_size = sizeof(sval);
67 data.mv_data = sval;
68 if (RES(MDB_KEYEXIST, mdb_put(txn, dbi, &key, &data, MDB_NOOVERWRITE)))
69 j++;
70 }
71 if (j) printf("%d duplicates skipped\n", j);
72 E(mdb_txn_commit(txn));
73 E(mdb_env_stat(env, &mst));
74
75 E(mdb_txn_begin(env, NULL, MDB_RDONLY, &txn));
76 E(mdb_cursor_open(txn, dbi, &cursor));
77 while ((rc = mdb_cursor_get(cursor, &key, &data, MDB_NEXT)) == 0) {
78 printf("key: %p %.*s, data: %p %.*s\n",
79 key.mv_data, (int) key.mv_size, (char *) key.mv_data,
80 data.mv_data, (int) data.mv_size, (char *) data.mv_data);
81 }
82 CHECK(rc == MDB_NOTFOUND, "mdb_cursor_get");
83 mdb_cursor_close(cursor);
84 mdb_txn_abort(txn);
85
86 j=0;
87 key.mv_data = sval;
88 for (i= count - 1; i > -1; i-= (rand()%5)) {
89 j++;
90 txn=NULL;
91 E(mdb_txn_begin(env, NULL, 0, &txn));
92 sprintf(sval, "%03x ", values[i]);
93 if (RES(MDB_NOTFOUND, mdb_del(txn, dbi, &key, NULL))) {
94 j--;
95 mdb_txn_abort(txn);
96 } else {
97 E(mdb_txn_commit(txn));
98 }
99 }
100 free(values);
101 printf("Deleted %d values\n", j);
102
103 E(mdb_env_stat(env, &mst));
104 E(mdb_txn_begin(env, NULL, MDB_RDONLY, &txn));
105 E(mdb_cursor_open(txn, dbi, &cursor));
106 printf("Cursor next\n");
107 while ((rc = mdb_cursor_get(cursor, &key, &data, MDB_NEXT)) == 0) {
108 printf("key: %.*s, data: %.*s\n",
109 (int) key.mv_size, (char *) key.mv_data,
110 (int) data.mv_size, (char *) data.mv_data);
111 }
112 CHECK(rc == MDB_NOTFOUND, "mdb_cursor_get");
113 printf("Cursor prev\n");
114 while ((rc = mdb_cursor_get(cursor, &key, &data, MDB_PREV)) == 0) {
115 printf("key: %.*s, data: %.*s\n",
116 (int) key.mv_size, (char *) key.mv_data,
117 (int) data.mv_size, (char *) data.mv_data);
118 }
119 CHECK(rc == MDB_NOTFOUND, "mdb_cursor_get");
120 mdb_cursor_close(cursor);
121 mdb_txn_abort(txn);
122
123 mdb_dbi_close(env, dbi);
124 mdb_env_close(env);
125 return 0;
126 }
127